Gonex Adult Wind Mask Bike Helmet, White Color: White Material: Housing: High quality 08 mm PC + matt printing, inner casing: 85 EPS (high-density foaming/imported materials) integrally molded Size: About 30 x 22 x 15cm and weight: 270g Head circumference: About 57 to 62 cm adjustable Features: Streamlined design, anti-wind age, soft washable pads, strong, 28-hole breathable big holes, with visor, comfortable lining with regulator